导航控制器返回，网上已经有开源的FDFullscreenPopGesture，屏幕本身边缘也可以是可以侧滑返回的，如果自己想简单的时候也可以，首要要获取控制器的interactivePopGestureRecognizer，然后获取手势的delegate~
如下所示:
**2016-12-08 16:48:32.573FlyElephant[21021:320874] ****全屏手势****:<UIScreenEdgePanGestureRecognizer: 0x7fc04d809fb0; state = Possible; delaysTouchesBegan = YES; view = <UILayoutContainerView 0x7fc04d805730>; target= <(action=handleNavigationTransition:, target=<_UINavigationInteractiveTransition 0x7fc04d8097c0>)>>**
**2016-12-08 16:48:32.573 FlyElephant[21021:320874] ****全屏手势****Target:<_UINavigationInteractiveTransition: 0x7fc04d8097c0>**
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.navigationItem.title = @"FlyElephant";
[self.navigationController.navigationBar setBarTintColor:[UIColor greenColor]];
NSLog(@"全屏手势:%@",self.navigationController.interactivePopGestureRecognizer);
NSLog(@"全屏手势Target:%@",self.navigationController.interactivePopGestureRecognizer.delegate);
id target = self.navigationController.interactivePopGestureRecognizer.delegate;
// 创建全屏滑动手势，调用系统自带滑动手势的target的action方法
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:target action:@selector(handleNavigationTransition:)];
pan.delegate = self;
// 给导航控制器的view添加全屏滑动手势
[self.view addGestureRecognizer:pan];
// 禁止使用系统自带的滑动手势
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
// 根控制器不侧滑返回
if (self.childViewControllers.count == 1) {
// 表示用户在根控制器界面，就不需要触发滑动手势，
return NO;
}
return YES;
}
